Patents by Inventor Dimitris Papanastasiou
Dimitris Papanastasiou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230207302Abstract: A time-of-flight, TOF, mass spectrometer, MS, comprising: an ion source for supplying a group of ions, including a first ion having a first mass-to-charge ratio m1/z1, a second ion having a second mass-to-charge ratio m2/z2 and a third ion having a third mass-to-charge ratio m3/z3 wherein m3/z3>m2/z2>at a time t0; a first set of electrodes, including a first electrode, and a second set of electrodes, including a first electrode and an Nth electrode, wherein the first set of electrodes and the second set of electrodes are mutually spaced apart by a gap therebetween; an ion detector for detecting the ions; a set of power supplies, including a first power supply, electrically coupled to the first set of electrodes and to the second set of electrodes; and a controller configured to control the set of power supplies to apply respective potentials to the first set of electrodes and the second set of electrodes; wherein the controller is configured to control the set of power supplies to: provide a first substType: ApplicationFiled: May 18, 2021Publication date: June 29, 2023Inventors: John ALLISON, Dimitris PAPANASTASIOU, Alexander LEKKAS
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Publication number: 20220344144Abstract: An apparatus (100, 300, 700) is described, comprising: a linear ion trap (102) comprising two pairs of pole electrodes and a radiofrequency, RF, electrical potential supply (117) configured to apply respective RF waveforms to the pairs of pole electrodes, thereby forming a RF trapping field component to trap analyte ions (116) radially in a trapping region (115) of the linear ion trap for processing of the analyte ions (116) therein; a charged particle source (101) comprising a pulse valve (103), a conduit (106, 107), having an entrance in fluid communication therewith and an exit, wherein the conduit (106, 107) extends in the direction of the trapping region (115), and a discharge device (108) electrically coupled to an electrical potential supply (109) and disposed between the entrance and the exit of the conduit (106, 107), wherein the pulse valve (103) is configured to release a gas pulse from a gas supply into the entrance of the conduit (106, 107) and wherein the electrical potential supply (109) is conType: ApplicationFiled: April 19, 2022Publication date: October 27, 2022Applicant: FASMATECH SCIENCE AND TECHNOLOGY SAInventor: DIMITRIS PAPANASTASIOU
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Patent number: 11114292Abstract: A linear ion trap system includes a linear ion trap having at least two discrete trapping regions for processing ions. An RF electrical potential generator produces two RF waveforms applied to a pair of pole electrodes of the linear ion trap forming a RF trapping field component to trap ions radially. A multi-output DC electrical potential generator produces a first set of multiple DC field components superimposed to the RF trapping field component and distributed across the length of the linear ion trap to control ions axially. A control unit is configured to switch the DC electrical potentials and DC field components collectively forming a first trapping region of the at least two discrete trapping regions that is populated with ions to alter ion potential energy from a first level to a second level, and to enable at least a first ion processing step in at least one of the first and second levels.Type: GrantFiled: July 10, 2019Date of Patent: September 7, 2021Assignee: FASMATECH SCIENCE & TECHNOLOGY LTD.Inventors: Dimitris Papanastasiou, Emmanuel Raptakis
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Patent number: 10763097Abstract: A mass spectrometer for analyzing fragment ions includes an ion source, an ion mobility spectrometer, and a system of electrodes. The ion source is configured to produce fragment ions. The ion mobility spectrometer is configured to receive fragment ions produced by the ion source and to separate at least a fraction of the received fragment ions according to their ion mobility into mobility-separated fragment ions. The system of electrodes is configured to receive DC electrical potentials to transfer at least a fraction of the mobility-separated fragment ions to a mass analyzer for generating a mass-to-charge (m/z) spectrum exhibiting reduced spectral complexity.Type: GrantFiled: May 13, 2019Date of Patent: September 1, 2020Assignee: FASMATECH SCIENCE & TECHNOLOGY LTD.Inventor: Dimitris Papanastasiou
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Publication number: 20190355568Abstract: A mass spectrometer for analyzing fragment ions includes an ion source, an ion mobility spectrometer, and a system of electrodes. The ion source is configured to produce fragment ions. The ion mobility spectrometer is configured to receive fragment ions produced by the ion source and to separate at least a fraction of the received fragment ions according to their ion mobility into mobility-separated fragment ions. The system of electrodes is configured to receive DC electrical potentials to transfer at least a fraction of the mobility-separated fragment ions to a mass analyzer for generating a mass-to-charge (m/z) spectrum exhibiting reduced spectral complexity.Type: ApplicationFiled: May 13, 2019Publication date: November 21, 2019Applicant: FASMATECH SCIENCE & TECHNOLOGY LTD.Inventor: DIMITRIS PAPANASTASIOU
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Publication number: 20190333751Abstract: A linear ion trap system includes a linear ion trap having at least two discrete trapping regions for processing ions. An RF electrical potential generator produces two RF waveforms applied to a pair of pole electrodes of the linear ion trap forming a RF trapping field component to trap ions radially. A multi-output DC electrical potential generator produces a first set of multiple DC field components superimposed to the RF trapping field component and distributed across the length of the linear ion trap to control ions axially. A control unit is configured to switch the DC electrical potentials and DC field components collectively forming a first trapping region of the at least two discrete trapping regions that is populated with ions to alter ion potential energy from a first level to a second level, and to enable at least a first ion processing step in at least one of the first and second levels.Type: ApplicationFiled: July 10, 2019Publication date: October 31, 2019Applicant: FASMATECH SCIENCE & TECHNOLOGY LTD.Inventors: DIMITRIS PAPANASTASIOU, EMMANUEL RAPTAKIS
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Patent number: 10381214Abstract: A linear ion trap includes at least two discrete trapping regions for processing ions and at least one gas pulse valve for applying pulses of gas to dynamically control pressure in the at least two discrete trapping regions. A RF electrical potential generator produces two RF waveforms, each applied to a pair of pole electrodes of the linear ion trap forming a RF trapping field component to trap ions radially. A multi-output DC electrical potential generator produces multiple DC field components superimposed to the RF trapping field component and distributed across the length of the linear ion trap to control ions axially. A control unit is configured to switch the DC electrical potentials and corresponding DC field components collectively forming a first trapping region of the at least two discrete trapping regions that is populated with ions to alter ion potential energy from a first level to a second level, and to enable at least a first ion processing step in at least one of the first and second levels.Type: GrantFiled: January 23, 2018Date of Patent: August 13, 2019Inventors: Dimitris Papanastasiou, Emmanuel Raptakis
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Publication number: 20180174819Abstract: A linear ion trap includes at least two discrete trapping regions for processing ions and at least one gas pulse valve for applying pulses of gas to dynamically control pressure in the at least two discrete trapping regions. A RF electrical potential generator produces two RF waveforms, each applied to a pair of pole electrodes of the linear ion trap forming a RF trapping field component to trap ions radially. A multi-output DC electrical potential generator produces multiple DC field components superimposed to the RF trapping field component and distributed across the length of the linear ion trap to control ions axially. A control unit is configured to switch the DC electrical potentials and corresponding DC field components collectively forming a first trapping region of the at least two discrete trapping regions that is populated with ions to alter ion potential energy from a first level to a second level, and to enable at least a first ion processing step in at least one of the first and second levels.Type: ApplicationFiled: January 23, 2018Publication date: June 21, 2018Applicant: FASMATECH SCIENCE & TECHNOLOLGY LTD.Inventors: DIMITRIS PAPANASTASIOU, EMMANUEL RAPTAKIS
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Patent number: 9978578Abstract: A linear ion trap includes at least two discrete trapping regions for processing ions, a RF electrical potential generator, a multi-output DC electrical potential generator, and a control unit. The RF electrical potential generator produces two RF waveforms each applied to a pair of pole electrodes of the linear ion trap forming a RF trapping field component to trap ions radially. The multi-output DC electrical potential generator produces multiple DC field components superimposed to the RF field component and distributed across the length of the linear ion trap to control ions axially. The control unit switches the DC electrical potentials and corresponding DC field components collectively forming a first trapping region populated with ions to alter ion potential energy from a first level to a second level, and enables a first ion processing step in at least one of the first and second levels.Type: GrantFiled: February 3, 2016Date of Patent: May 22, 2018Assignee: FASMATECH SCIENCE & TECHNOLOGY LTD.Inventors: Dimitris Papanastasiou, Emmanuel Raptakis
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Publication number: 20170221694Abstract: A linear ion trap includes at least two discrete trapping regions for processing ions, a RF electrical potential generator, a multi-output DC electrical potential generator, and a control unit. The RF electrical potential generator produces two RF waveforms each applied to a pair of pole electrodes of the linear ion trap forming a RF trapping field component to trap ions radially. The multi-output DC electrical potential generator produces multiple DC field components superimposed to the RF field component and distributed across the length of the linear ion trap to control ions axially. The control unit switches the DC electrical potentials and corresponding DC field components collectively forming a first trapping region populated with ions to alter ion potential energy from a first level to a second level, and enables a first ion processing step in at least one of the first and second levels.Type: ApplicationFiled: February 3, 2016Publication date: August 3, 2017Applicant: FASMATECH SCIENCE & TECHNOLOGY LTD.Inventors: DIMITRIS PAPANASTASIOU, EMMANUEL RAPTAKIS
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Patent number: 9589782Abstract: Techniques are provided for generating charged droplets of liquid entrained within a gas flow within a vacuum chamber and for controlling the gas flow. The gas flow with the entrained charged droplets of liquid is jetted into the vacuum chamber along a predetermined jetting axis. The gas jet is received within a gas conduit housed within the vacuum chamber and having a conduit bore coaxial with the predetermined jetting axis. The received gas jet is caused to be restrained to form a laminar gas flow entrained with charged droplets inside of the gas conduit for guiding the entrained charged droplets therealong.Type: GrantFiled: April 4, 2014Date of Patent: March 7, 2017Inventors: Dimitris Papanastasiou, Emmanuel Raptakis, Diamantis Kounadis, Alexander Lekkas, Ioannis Orfanopoulos
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Patent number: 9589777Abstract: A guide apparatus includes a vacuum compartment provided at a background pressure and having a gas inlet opening arranged for jetting a gas in the form of a free jet stream containing entrained ions into a vacuum chamber along a predetermined jetting axis. At least one duct housed within the vacuum chamber has a guide bore positioned coaxially with the jetting axis for receiving the free jet stream such that a supersonic free jet is formed in the duct with a jet pressure ratio P1/P2 restrained to a value that does not exceed (A/a)3 to form a subsonic laminar gas flow inside of the duct for guiding the entrained ions, where P1 is the pressure at an exit end of the gas inlet opening, P2 is the background pressure, A is the cross sectional area of the bore, and a is the cross sectional area of the gas inlet opening.Type: GrantFiled: June 25, 2013Date of Patent: March 7, 2017Inventors: Dimitris Papanastasiou, Emmanuel Raptakis, Diamantis Kounadis, Alexander Lekkas, Ioannis Orfanopoulos, Ioannis K Nikolos
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Publication number: 20160049285Abstract: Techniques are provided for generating charged droplets of liquid entrained within a gas flow within a vacuum chamber and for controlling the gas flow. The gas flow with the entrained charged droplets of liquid is jetted into the vacuum chamber along a predetermined jetting axis. The gas jet is received within a gas conduit housed within the vacuum chamber and having a conduit bore coaxial with the predetermined jetting axis. The received gas jet is caused to be restrained to form a laminar gas flow entrained with charged droplets inside of the gas conduit for guiding the entrained charged droplets therealong.Type: ApplicationFiled: April 4, 2014Publication date: February 18, 2016Inventors: DIMITRIS PAPANASTASIOU, EMMANUEL RAPTAKIS, DIAMANTIS KOUNADIS, ALEXANDER LEKKAS, IOANNIS ORFANOPOULOS
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Publication number: 20150340218Abstract: A guide apparatus includes a vacuum compartment provided at a background pressure and having a gas inlet opening arranged for jetting a gas in the form of a free jet stream containing entrained ions into a vacuum chamber along a predetermined jetting axis. At least one duct housed within the vacuum chamber has a guide bore positioned coaxially with the jetting axis for receiving the free jet stream such that a supersonic free jet is formed in the duct with a jet pressure ratio P1/P2 restrained to a value that does not exceed (A/a)3 to form a subsonic laminar gas flow inside of the duct for guiding the entrained ions, where P1 is the pressure at an exit end of the gas inlet opening, P2 is the background pressure, A is the cross sectional area of the bore, and a is the cross sectional area of the gas inlet opening.Type: ApplicationFiled: June 25, 2013Publication date: November 26, 2015Applicant: FASMATECH SCIENCE & TECHNOLOGY SAInventors: DIMITRIS PAPANASTASIOU, EMMANUEL RAPTAKIS, DIAMANTIS KOUNADIS, ALEXANDER LEKKAS, IOANNIS ORFANOPOULOS, IOANNIS K NIKOLOS
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Patent number: 9190255Abstract: A mass spectrometer comprises ion pulse means for producing ion pulses in a first vacuum chamber, ion trap means for receiving and trapping the ion pulses for mass analysis in a second vacuum chamber, and ion-optical lens means arranged between the ion pulse means and the ion trap means for receiving the ion pulses and outputting ions therefrom to the ion trap means. A first lens electrode and a second lens electrode collectively define an optical axis and are adapted for distributing a first electrical potential and second electrical potential therealong. Lens control means vary non-periodically with time the first electrical potential relative to the second electrical potential to control as a function of ion mass-to-charge ratio the kinetic energy of ions which have traversed the ion optical lens means. This controls the mass range of the ions receivable by the ion trap from the ion optical lens means.Type: GrantFiled: May 23, 2011Date of Patent: November 17, 2015Assignee: Fasmatech Science and Technology LLCInventors: Emmanuel Raptakis, Dimitris Papanastasiou
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Patent number: 9123517Abstract: The present disclosure relates to mass spectrometers and, in particular, multipole ion guides and control units that set the RF and DC potentials at the ion guide to, among other uses, radially confine an ion beam. In an exemplary embodiment, the ion guide includes circumferentially arranged elongated rods disposed about a common axis that form longitudinally traversing segments. At least a first and a second subset of the segments have an equal number of elongated rods and are physically configured to receive respective first and a second set of RF voltage waveforms from a control unit that produce a field distribution of a first order and a field distribution of a second order, respectively, different from the first order. The ratio of the number of rods to the order of the field distribution produced is an integer number.Type: GrantFiled: May 18, 2013Date of Patent: September 1, 2015Assignee: FASMATECH SCIENCE AND TECHNOLOGY SAInventors: Dimitris Papanastasiou, Emmanuel Raptakis
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Patent number: 8610054Abstract: The present invention is concerned with an ion analysis apparatus for conducting differential ion mobility analysis and mass analysis. In embodiments, the apparatus comprises a differential ion mobility device in a vacuum enclosure of a mass spectrometer, located prior to the mass analyzer, wherein the pumping system of the apparatus is configure to provide an operating pressure of 0.005 kPa to 40 kPa for the differential ion mobility device, and wherein the apparatus includes a digital asymmetric waveform generator that provides a waveform of frequency of 50 kHz to 25 MHz. Examples demonstrate excellent resolving power and ion transmission. The ion mobility device can be a multipole, for example a 12-pole and radial ion focusing can be achieved by applying a quadrupole field to the device in addition to a dipole field.Type: GrantFiled: April 30, 2010Date of Patent: December 17, 2013Assignee: Shimadzu CorporationInventors: Roger Giles, Dimitris Papanastasiou
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Publication number: 20130306855Abstract: The present disclosure relates to mass spectrometers and ion mobility spectrometers and methods for utilizing them and, in particular, to efficient detection of large size ionic species by attaching fluorescent agents to such species and utilizing high intensity light and appropriate optics to define a detection plane. A mechanism to detect fluorescence photons with high efficiency is coupled thereto. In an exemplary embodiment, a mass or ion mobility analyzer is utilized to separate fluorescent ionic species in space or time. The ionic species absorb and re-emit photons as they transverse the detection plane. The photons are directed to a photon detector that generates an electric signal that defines time or position (or position and time of intersection) of ionic species with the detection plane.Type: ApplicationFiled: May 18, 2013Publication date: November 21, 2013Applicant: Fasmatech Science & Technology SAInventors: EMMANUEL RAPTAKIS, Dimitris Papanastasiou
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Publication number: 20130306861Abstract: The present disclosure relates to mass spectrometers and, in particular, multipole ion guides and control units that set the RF and DC potentials at the ion guide to, among other uses, radially confine an ion beam. In an exemplary embodiment, the ion guide includes a plurality of circumferentially arranged elongated rods disposed about a common axis that form a plurality of longitudinally traversing segments. At least a first and a second subset of the segments have an equal number of elongated rods and are physically configured to receive a first and a second set of EMF from a control unit that results in a first multipolar field order distribution and a second multipolar field distribution, respectively, being produced that are different from one another.Type: ApplicationFiled: May 18, 2013Publication date: November 21, 2013Applicant: FASMATECH SCIENCE & TECHNOLOGY SAInventors: DIMITRIS PAPANASTASIOU, EMMANUEL RAPTAKIS
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Publication number: 20130068944Abstract: A mass spectrometer comprises ion pulse means for producing ion pulses in a first vacuum chamber, ion trap means for receiving and trapping the ion pulses for mass analysis in a second vacuum chamber, and ion-optical lens means arranged between the ion pulse means and the ion trap means for receiving the ion pulses and outputting ions therefrom to the ion trap means. A first lens electrode and a second lens electrode collectively define an optical axis and are adapted for distributing a first electrical potential and second electrical potential therealong. Lens control means vary non-periodically with time the first electrical potential relative to the second electrical potential to control as a function of ion mass-to-charge ratio the kinetic energy of ions which have traversed the ion optical lens means. This controls the mass range of the ions receivable by the ion trap from the ion optical lens means.Type: ApplicationFiled: May 23, 2011Publication date: March 21, 2013Inventors: Emmanuel Raptakis, Dimitris Papanastasiou